Sediment resuspension characteristics in Baltimore Harbor, Maryland

Maa, Jerome P.‐Y.; Sanford, Lawrence P.; Halka, Jeffrey P.

doi:10.1016/s0025-3227(97)00120-5

Cited by 125 publications

(81 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The values of M ranged over an order of magnitude from ~1.3 × 10 −6 kg m −2 s −1 for the mud substrate to 4.5 × 10 −8 kg m −2 s −1 for the cobble substrate for the erosion of salmon waste material (Table 1). M ranged from 2−8 × 10 −6 kg m −2 s −1 in the study of Sanford & Maa (2001), which is a re-analysis of Maa et al (1998), to 1.4 × 10 −6 kg m −2 s −1 in the study of Sanford et al (1991), to 7.0 × 10 −7 kg m −2 s −1 in the DEPOMOD study of Cromey et al (2002a). The erosion studies of Maa et al (1998) and Sanford & Maa (2001) were generally performed on muddy cohesive seabeds while the study of Cromey et al (2002b) used synthetic tracer beds of similar size and settling velocity to represent aquaculture fecal material.…”

Section: Erodibility Parameter (M)mentioning

confidence: 99%

“…4). In natural bottom sediments, the erosion of the seabed increases with increasing shear stress (Amos et al 1988, 1992, Maa et al 1998). The lack of erosion at higher shear stresses in this study occurred because of the fixed amount of waste available for erosion (Wiberg et al 1994, Law et al 2008our Fig.…”

Section: Substrate Typementioning

confidence: 99%

“…In addition, a DEPOMOD prediction is included based on elapsed time and an erodibility parameter of 7.0 × 10 −7 kg m −2 s −1 (Cromey et al 2002a,b). The dark blue line describes the actual data of Maa et al (1998) which is described in detail in Sanford & Maa (2001) and is included for comparison to this study seabed. The values of M ranged over an order of magnitude from ~1.3 × 10 −6 kg m −2 s −1 for the mud substrate to 4.5 × 10 −8 kg m −2 s −1 for the cobble substrate for the erosion of salmon waste material (Table 1).…”

Section: Erodibility Parameter (M)mentioning

confidence: 99%

“…Wave and current stress exerted on the seabed provide the work necessary to erode particles from the seabed, whereas particle size and mass, bed roughness, cohesion, porosity, consolidation, and biological activity control the erosion resistance of the seabed (Amos et al 1992, 1997, Maa et al 1998, Sanford & Maa 2001, Wiberg et al 2013. Overall understanding of cohesive sediment resuspension is incomplete because it is governed by not only hydrodynamic forces and the force of gravity, but also by cohesion, which depends on biological and electrochemical variables (Black et al 2002, Droppo et al 2007).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Erodibility of aquaculture waste from different bottom substrates

Law¹,

Hill²,

Milligan³

et al. 2016

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

A laboratory study was carried out to examine the effect of bed sediment texture on the erodibility of salmon aquaculture waste fecal material and salmon feed pellets. Erodibility measurements of this material were made using a Gust microcosm erosion chamber and artificially composed substrates of mud, sand, sand and gravel, sand and cobble, and cobble. Results show that cumulative mass eroded (CME) and erodibility constant (M) can vary by up to an order of magnitude depending on substrate composition, with a mud substrate having higher CME and M values than those of substrates composed of sand, gravel and cobble. Findings from this study suggest that bottom sediment texture plays a major role in aquaculture waste resuspension and subsequent transport and that predictive models of the transport of aquaculture waste should include the erosion dynamics of bottom texture.

show abstract

Section: Erodibility Parameter (M)mentioning

confidence: 99%

Section: Substrate Typementioning

confidence: 99%

Section: Erodibility Parameter (M)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Erodibility of aquaculture waste from different bottom substrates

Law¹,

Hill²,

Milligan³

et al. 2016

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

show abstract

“…Sanford (1994) found that in upper Chesapeake Bay wave-forced resuspension of bed sediment driven by winds dominated tidal resuspension, confirming the significance of winds and water level variation in broader estuarine processes, especially near the head of the bay. Field monitoring of open water conditions in the large tributaries has determined the spatial limits of the influence of river discharge versus tides, the role of storms in suspended sediment transport, and the entrainment thresholds for fine bed material (Nichols, 1993;Maa et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Hydrometeorological controls on water level in a vegetated Chesapeake Bay tidal freshwater delta

Pasternack

Hinnov

2003

Estuarine, Coastal and Shelf Science

View full text Add to dashboard Cite

ABSTRACT.Wind vectors, watershed discharge, and subestuarine water levels were monitored in a vegetated delta at the head of the Bush River, an upper Chesapeake Bay tributary in Maryland, during an El Niño/La Niña cycle 1995-1996 to investigate hydrometeorological processes that affect the tidal freshwater ecosystem located there. Time series of these processes were analyzed in both the time and frequency domains using such methods as flood frequency analysis, harmonic analysis, averaged and evolutionary power spectral analysis, and coherency spectral analysis. Wind speed variations with periods of 3-4 and 7 days were found to have both high spectral power and high statistical significance. The frequencies of these variations fluctuated over weeks to months and the amplitudes modulated seasonally, but the variations persisted interannually. Significantly greater subtidal wind speed variations in the prinicipal wind direction occurred during the cold and stormy La Niña winter of 1996 relative to the warm and dry El Niño winter of 1995. Data from 5 hurricanes occurring in the region during the study provided high-resolution snapshots of the mechanisms revealed by the time series analyses.Water level quickly responded to S-N directed wind speed fluctuations during the aperiodic hurricanes, illustrating the strong coupling between wind and water levels in this system. The magnitude of the response was large enough to determine the extent and duration of flooding over tens of hectares in important intertidal marsh habitats. Subtidal water level variations were greater during the La Niña period. During El Niño conditions, the E-W wind component played a larger role than during the La Niña period. Variations in local watershed discharge as well as Susquehanna River outflow had no measurable impact on water levels in the upper reaches of the Bush River tributary during the study.

show abstract

Role of wind in erosion‐accretion cycles on an estuarine mudflat

et al. 2017

View full text Add to dashboard Cite

Wind is an important regulator of coastal erosion and accretion processes that have significant ecological and engineering implications. Nevertheless, previous studies have mainly focused on storm‐generated changes in the bed level. This paper aims to improve the understanding of wind‐induced erosion‐accretion cycles on intertidal flats under normal (nonstormy) weather conditions using data that relates to the wave climate, near‐bed 3‐D flow velocity, suspended sediment concentration, and bed‐level changes on a mudflat at the Yangtze Delta front. The following parameters were calculated at 10 min intervals over 10 days: the wind wave orbital velocity (Ûδ), bed shear stress from combined current‐wave action, erosion flux, deposition flux, and predicted bed‐level change. The time series of measured and predicted bed‐level changes both show tidal cycles and a 10 day cycle. We attribute the tidal cycles of bed‐level changes to tidal dynamics, but we attribute the 10 day cycle of bed‐level changes to the interaction between wind speed/direction and neap‐spring cyclicity. We conclude that winds can significantly affect bed‐level changes in mudflats even during nonstormy weather and under macro‐mesotidal conditions and that the bed‐level changes can be predicted well using current‐wave‐sediment combined models.

show abstract

Sediment resuspension characteristics in Baltimore Harbor, Maryland

Cited by 125 publications

References 12 publications

Erodibility of aquaculture waste from different bottom substrates

Erodibility of aquaculture waste from different bottom substrates

Hydrometeorological controls on water level in a vegetated Chesapeake Bay tidal freshwater delta

Role of wind in erosion‐accretion cycles on an estuarine mudflat

Contact Info

Product

Resources

About